Automatic stop for talking machines



- F. CHENEY, AUTOMATIC STOP FOR TALKING MACHINES.

APPLICATION FILED JULY 13,1917.

1,435,697, Patented N v. 14,1922

III"

Patented Nov. 14!, 192.2.

l,435,3? TENT QFIQ.

FOREST CHENEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHENEY COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF TALKING MACHINE ILLINOIS.

AUTOMATIC STOP FOR TALKING MACHINES.

Application filed July 13,

To all whom it may concern:

Be it known that I, FonEsT CHENEY, a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and use ful Improvements in Automatic Stops for Talking Machines,of which the following is a'specification. Y Y j My present invention relates to improvements in stops or brake mechanism for talking machines, more particularly those of the type'in which a brake is applied when the needle has reached the end of the record.

The principal objects of my invention are to provide improved means for stopping a talking machine when the needle has reached the end of the record, to provide improved means for adjusting brake mechanism for talking machines to suit records of different kinds and sizes, and generally to improve, simplify and cheapen the construction of stop and brake mechanism for talking machines.

In attaining these and other objects and advantages to be hereinafter set forth I-have provided a construction one embodiment of which is illustrated in the accompanying drawings in which:

Figure 1 is a side elevation, partly in section of a portion oi a talkingmachine with my improved stop applied thereto;

Figure 2 is a section on the line 22 of Figure 1, showing the stop in its ofl" posi tion' Figure 3 is a section on the line 22 oi F igurel showing-the stop in its on position; and Y I Figure l is a section on'the line 4-4c of Figure 2. j

In the drawings 5 represents the tone arm and 6 the turntable of a talking machine. The tone arm 5 is provided with a downwardly extending cylindrical portion 7 adapted to rotate within the tubular portion 8v attached to the base 9 of the machine. Around this part 8 is rotatably arranged a sleeve 10 which is connected to the part 7 of the. tone arm by pinslland 12 so that the sleeve turns with the tone arm. Slots are formed in the part 8 to allow the pins to move within the de'sired arc of movement of the tone arm. To the sleeve 10is connected by means of the pin 11 an arm 13 which, in the form and construction illustrated,consists of a thin metal stamping.

1917. Serial No. 180,263.

This arm is provided with a curved portion 14 of the same curvature as the sleeve 10 and also a lateral projection 15 adapted to engage another portion of the sleeve 10, in order to prevent lateral movement of the arm 13 relatively to the sleeve 10. Vertical movement of the arm is prevented by the inwardly turned projections 16 which engage the upper edge of the sleeve 10. The outer end 17 of this arm operates the stop mechanism as Will be shortly described.

The stop mechanism comprises a base -l on which is arranged a brake member 18 pivotally mounted on the base 4 at 19 and carrying a brake shoe 20. A spring 21 tends to turn the brake shoe into engagement with the inner face of the flange 22 of the turn table 6 as shown in Figure 3. A lever 37 carrying a knurled knob 38 is connected to the brake member 18 for moving the latter manually against the tension of the spring 21. The brake shoe after movement by the lever 37 is releasably held out of engagement with the flange by means of a latch 23, the shoulder 24 of which engages the shoulder 25 of the brakemember 18. The latch isoperated by means of the trigger or lever 26. The end of the trigger 26 loosely engages a slot 39 in the end of the latch 23 so that the trigger and latch may move slightly independently of each other as a result of the lost motion connection. The lost motion connection be tween the trigger 26 and latch 23, though slight, permits the machine to run a littlelonger than the'normal stop setting would seem to indicate. In this way there is no chance for the machine to stop automatically until the record is completely played. Movement of the trigger and latch away from the brake member is limited by the stop 40 as shown in Figure 3.

Figure 2 shows the position of the parts when the latch is holding the brake shoe in its retracted position and Figure 3 the position of the parts after the brake member and shoe have been released by moving the latch out of engagement with the shoulder 25 ofthebrake member. In this latter position the end of the latch engages a second projection 27 on the brake member while the brake shoe which is preferably of yielding material such as leather, is pressed into contact with the flange 22.

Thetrigger 26 is pivoted at 28 about which point the lever 29 also turns. The lever 29 is provided at its outer end with knurled knob e1 adapted to be engaged by the end 17 of the arm 13 as the latter is moved by the tone arm towards the left. (Figures 2 and'3).

The trigger 26 and lever 29 are connected frictionally so that their relative positions may be adjusted. For this purpose the trigger is provided with a right-angle en'- tension 30 carrying at its end a bolt 31. The lever 29 is also provided with an extension 32 overlying the extension 30 and having a segmental slot 33 formed in its end portion. The bolt 31 passes through this slot and as the head 34 of this bolt is retracted by the spring 35 theextensions 30 and 32 are held in frictional engagement with each other as will be evident from Figure l. The segmental slot 33 allows adjustment between the lever 29 and the trigger 26; The tension of the spring may be varied as desired by means of the nut 45 on the bolt 31. The trigger 26 is provided with a hooked projection 36 adapted to engage one end of the spring 21. This spring tends to hold the trigger and thereby the latch in contactwith the brake memberi It will be observed that the spring 21 actuates both the brake member and also the trigger and latch. V

In the operation of the device the lever 29 is first moved to the left, as viewed in Fig ures 2 and 3, an amount such that the tone arm may be moved to bring the needle into engagement with the last groove or substantially the last groove of the record without causing arm 13 to engage the lever 29. The tone arm is then moved to the extent that the needle engages with the last groove. The lever 29 is then moved to the right until it engages the arm 13, thereby leaving a slight space between the trigger 26 and the outer-wall of the slot 39 to prevent premature stopping of the machine. As the movement of the trigger 26 is limited by the stop 40 the arm 29 is moved relatively to; the trigger by reason of the frictional engage ment therebetween to allow the tone arm 5 and arm 13 to move for setting the machine for proper stopping thereof. Thejtone arm is thenmoved to bring the needle in engagement with the groove at the beginning of the record and the brake is released by manually moving knob 38 to the left in order to play the record. When the knob 38 is moved counter clockwise, that is, to re lease the brake, the spring 21 cooperating with the trigger 26 moves the latter to bring the latching shoulder in the latch 23 into position to engage the shoulder 25 to hold the brake in released position.

As soon as the shoulder 25 of the brake member is moved beyond the shoulder 24- of the latch the latter is movedupwardly by the action of the spring 21 on the trigger 26 so that the brake member and shoe are held in their retracted position. This movement of the latch and trigger causes a slight movement of the lever 29 to the right. When the needle has reached the end of the record, the end 17 of the arm 18 contacts with the knob 41 of the arm 29 and gradually moves the latter and trigger 26 to the left without imparting any motion to the latch 23 until the safety lost motion is taken up and then the latch is tripped and the brake applied, In this way the machine will not be stopped automatically until the record is completely played.

Having thus described my invention'and illustrated its use, what I claim as new and desire to secure by Letters Patent is:

1. A talking machine stop comprising a brake, a latch for holding said brake in its off position, a member adapted to operate said latch, a trip lever adjustable with reference to said member to time the occurrence of the tripping action, and an abutment forming a stop for said member durin the setting of the trip lever while the bra e is in its stopping position.

2. A. talking machine stop comprising a pivoted, spring-projected brake member having a latch-engaging shoulder, a pivoted latch-member having a projection for engaging said shoulder when the brake is in the off position, a member adapted tooperate said latch, a trip lever adjustable with reference to said member to time the occurrence of the tripping action, and an abutment forming a stop for said member during the setting of the trip lever while the brake is in its stopping position.

3. A. talking machine stop comprising a pivoted brake shoe, a latch pivoted adjacent said shoe and movable therewith, the latch and shoe having a plurality of co-operating shoulders whereby the relative positions thereof may be varied, a two-part trigger having a common pivot, one part of said trigger being adapted to operate the latch to releasably engage the shoe, and the other 'part of the trigger being adjustable with respect to the first part to time the occurrence of the tripping action.

4. A talking machine stop comprising a brake, releasable means for holding said brake in its off position and including a trigger member, a trip lever for operating said means, and a frictional connection between said lever and said trigger including a member having a segmental slot, a bolt passing through said slot and carried by said trigger member, and resilient means acting on said bolt adapted to hold said members in frictional engagement.

5. A talking machine stop comprising a brake, releasable means for holding saidbr-ake in ,off position including a trigger member, a trip lever for operating said 1,435,697 gag,

means, an adjustable frictional connection between said lever and said trigger including a member having a segmental slot, a bolt passing through said slot and carried by said trigger member, a spring on said bolt adapted to hold the members in frictional engagement, a nut for varying the tension of said spring, and means carried by the tone arm for actuating the trip.

6. A talking machine stop comprising a brake, releasable means for holding said brake in off position including a trigger member, a trip lever for operating said means, said trip lever having a segmental slot in one end, an adjustable frictional connection between said lever and said trigger including a bolt passing through the slot and carried by said trigger member, and a spring on said bolt adapted to hold the mem bers in frictional engagement.

7. A talking machine stop comprising a brake, releasable means for holding said brake in off position including a trigger, a trip lever pivoted intermediate its ends and having one end provided with a. segmental slot, said trigger member being in engagement with said trip lever and supported by said pivot, and means cooperating with said trigger member and said slot for maintaining frictional engagement therebetween.

8. In a sound reproducing machine,.in combination, means for actuating a record, means for controlling the movement of said actuating means, a latch for holding said control means in a given position, tripping mechanism for operating said latch adjus able with respect to said latch to time the occurrence of the tripping action, said tripping mechanism including two relatively movable members, one of which: members engages said latch, a projection secured to the tone arm and arranged to engage the other member of said tripping member under certain conditions, and a spring for actuating the tripping mechanism when one member thereof is engaged by said projection.

Signed at Chicago, in the State of Illinois, and county of Cook this 9th day of July,

FOREST CHENEY. 

